- Thread starter
- #1

#### paulmdrdo

##### Active member

- May 13, 2013

- 386

^{3}x/sec

^{2}x)dx

this is what i do:

∫(tan

^{3}xsec

^{-2}x)dx

∫(tan

^{2}xtanxsec

^{-1}xsec

^{-1}x)dx

∫(sec

^{2}x-1)tanxsec

^{-1}xsec

^{-1}x)dx

let u = secx;

du = tanxsecxdx

now i'm stuck! please help.